微造型在机械密封作用中若干关键问题的探讨

发布时间：2018-05-01 05:02

本文选题：机械密封 + 机理　；参考：《新疆大学》2017年硕士论文

【摘要】：随着现代工业的迅速发展,机械密封已在各种流体机械和设备中得到广泛应用。由于机械密封在安全、环保、经济、节能等方面的意义重大,逐渐发展成为某些场合的关键技术,因此国内外众多学者对密封理论、技术及产品展开研究,但对密封作用机理的解释还有待进一步完善。为探讨端面微造型在机械密封中的作用机理,本文以形成动压效应的几何楔空间为切入点,分析了端面微造型在摩擦副表面中的几何构成。分析结果表明:端面微造型使摩擦副表面几何形貌不平,并借助压差流和剪切流形成动压效应,而表面微观几何形貌是一种特殊的微造型。实验结果的分析表明,表面微观几何形貌不平可影响动压效应,经电化学光整加工的表面微观几何形貌使润滑膜增厚。机械密封中的摩擦副表面微造型不仅具有润滑与密封的作用,而且还具有速度式泵送与容积式泵送的效应。表面微造型的不平度、分布密度以及形状等因素对润滑膜厚度及其稳定性等影响的研究将有助于机械密封理论和技术的进一步发展。
[Abstract]:With the rapid development of modern industry, mechanical seal has been widely used in various fluid machinery and equipment. Because of the great significance of mechanical seal in safety, environmental protection, economy, energy saving and so on, it has gradually developed into the key technology in some occasions, so many scholars at home and abroad have carried out research on sealing theory, technology and products. However, the explanation of sealing mechanism needs to be further improved. In order to discuss the action mechanism of the end face micro modeling in the mechanical seal, the geometry composition of the end face micro modeling in the friction pair surface is analyzed by taking the geometric wedge space which forms the dynamic pressure effect as the breakthrough point. The results show that the surface geometry of the friction pair is uneven with the help of differential pressure flow and shear flow, and the micro-geometry of the surface is a kind of special micro-modeling. The analysis of the experimental results shows that the roughness of the surface micro-geometry can affect the dynamic pressure effect, and the lubrication film is thickened by the micro-geometric morphology of the surface prepared by electrochemical finishing. The surface microform of friction pair in mechanical seal not only has the function of lubrication and sealing, but also has the effect of speed pumping and displacement pumping. The study on the influence of the roughness distribution density and shape on the thickness and stability of the lubricating film will be helpful to the further development of the mechanical seal theory and technology.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH136

【参考文献】